[Haskell-cafe] Core packages and locale support
beroal at ukr.net
Sat Jun 26 02:29:29 EDT 2010
On 25.06.10 20:09, Jason Dagit wrote:
> you got everything right here. So, as you said, there is a mismatch
> between representation in Haskell (list of code points) and
> representation in the operating system (list of bytes), so we need to
> know the encoding. Encoding is supplied by the user via locale
> (https://secure.wikimedia.org/wikipedia/en/wiki/Locale), particularly
> LC_CTYPE variable.
> The problem with encodings is not new -- it was already solved
> e.g. for
> This is the part where I don't understand the problem well. I thought
> that with IO the program assumes the locale of the environment but
> that with filepaths you don't know what locale (more specifically
> which encoding) they were created with. So if you try to treat them
> as having the locale of the current environment you run the risk of
> misunderstanding their encoding.
Incorrect encoding of filepaths is common in e.g. Cyrillic Linux
(because of multiple possible encodings --- CP1251, KOI8-R, UTF-8) and
is solved by fiddling with the current locale and media mount options.
No need to change a program, or to tell character encoding to a program.
It is not a programming language issue.
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